goto 0.4.4
update changelog
grapher: PIL modules by default
README.rst: fix typos
timeside/static: remove executable bit
add core to init (telemeta compatibilty)
Merge branch 'release/0.4.4' into dev

Conflicts:
	README.rst
	setup.py
	timeside/__init__.py
Refactoring of AnalyzerResult in order to address issue #13

Add AnalyzerAttributes to handle the metadata in AnalyzerResult and store the Analyzer parameters
Attributes include :
- [x] sampleRate, blockSize, stepSize
- [ ] version of the analyzer (or Timeside release ?)
- [ ] audio source file name
- [x] analysis parameters
- [ ] precision of the results data (float, long, ...)
- [ ] stereo / mono / left / right channel management during analysis ?

AnalyzerResult now include a @property field "properties" containing a dictionnary of the following stats about the results data :
- mean
- median,
- std
- min
- max

Also change the result value return by AubioTemporal because mean and median are now include in "properties"
 * fix some variable names fot overhaul coherence
 * fix yafee.results container
Fix isssue in AnalyzerResultContainer representation
Change 'Attributes' to 'Metadata' in AnalyzerResult
Create MetadataObject as a generic class to handle Metadata
Add segment support to the decoder through GNonLin

Segment 'start' and 'duration' should be passed during the decoder setup.
If omitted, it keep the original behavior.
Fix issue in Yaafe analyzer

Yaafe setup was overwriting self.blocksize() and self.samplerate() instead of self.input_blocksize and self.input_samplerate
Fix gstreamer caps issue in decoder core related to Gnonlin

Gnonlin gnlurisource needs the fields 'start' and 'duration' to be set to be abble to query the duration of the segment
Change FileDecoder init function input parameters and completely switch from uridecodebin to gnlurisource

- FileDecoder Init Input parameter are now (uri, start, duration)
    Default values for start and duration keep FileDecoder to decode the whole file
    - Default value for start is 0
    - Default value for duration is set to the remaining duration of the file after the start position
- No more use of uridecodebin : switch to gnlurisource to enable segment specification
timeside/analyzer/aubio_{pitch,temporal}.py: validate changes
timeside/analyzer/aubio_temporal.py: improve comments
Switch back to gstreamer uridecodebin when no segment are specified
Add New Metadata fields (data, idMetadata, audioMetadata, frameMetadata, labelMetadata, parameters) structure to be included in AnalyzerResult